Unless the American carriers have managed to screw up one more technology (which is entirely possible) SMS is asynchronous. When you turn the device on it receives all the messages queued in the network.
If your device is off when your network gets an incoming SMS, the store-and-forward system just holds it until it can be delivered. This is exactly the same behaviour as Twitter or indeed e-mail.
My carrier can send SMS to multiple devices, or I can pick them up via a web portal, or via e-mail.
If your device is off when your network gets an incoming SMS, the store-and-forward system just holds it until it can be delivered. This is exactly the same behaviour as Twitter or indeed e-mail.
My carrier can send SMS to multiple devices, or I can pick them up via a web portal, or via e-mail.